1 files changed, 65 insertions, 0 deletions
diff --git a/source/main.c b/source/main.c
new file mode 100644
index 0000000..4583eb5
--- /dev/null
+++ b/source/main.c
@@ -0,0 +1,65 @@
+/*
+	Copyright 2022-2023 Gabriel Bjørnager Jensen.
+
+	This file is part of agbsum.
+
+	agbsum is free software: you can redistribute it
+	and/or modify it under the terms of the GNU
+	Affero General Public License as published by
+	the Free Software Foundation, either version 3
+	of the License, or (at your option) any later
+	version.
+
+	agbsum is distributed in the hope that it will
+	be useful, but WITHOUT ANY WARRANTY; without
+	even the implied warranty of MERCHANTABILITY
+	or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU Affero General Public License for more
+	details.
+
+	You should have received a copy of the GNU
+	Affero General Public License along with agbsum.
+	If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <agbsum.h>
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#if CHAR_BIT != 0x8
+#error "agbsum only support 8-bit byte systems"
+#endif
+
+int main (int const argc, char const* const* const argv)
+{
+	struct agb_Data data;
+	agb_initdata (&data);
+	agb_checkParams (&data, argc, argv);
+
+	data.image = agb_open (data.path);
+
+	char unsigned buffer[agb_sumOffset + 0x1];
+
+	agb_read (buffer, data.image);
+
+	{
+		char unsigned const sum      = agb_getSum (buffer);
+		char unsigned const imageSum = buffer[agb_sumOffset];
+
+		if (imageSum == sum || !data.doPatch) {
+			// Don't patch the ROM if it's already okay or we're not allowed to.
+			if (!data.silent) {printf ("\"%s\": %hhX (%hhX in file)\n", data.path, sum, imageSum);}
+			agb_exit (agb_Cnd_Ok, data.image);
+		}
+
+		agb_patch (data.image, sum);
+
+		// If we aren't supposed to print anything then
+		// don't.
+		if (!data.silent) { printf ("\"%s\" @ %zX: %hhX => %hhX\n", data.path, agb_sumDataStart + agb_sumOffset, imageSum, sum); }
+	}
+
+	agb_exit (agb_Cnd_Ok, data.image);
+}